The flag-raising time in Beijing is June 2023 10.

June 2023: 65438+1 October1,the flag-raising time in Beijing is 6: 00, 10, and the flag-lowering time is 5: 58 pm.

The flag-raising time is generally based on the time when the sun rises in Beijing. In Tiananmen Square, the flag-raising time is usually in the morning, when the sun just rises. The specific flag-raising time will change according to the season and weather conditions.

Every year 1 October, 1 May, 1 July, 1 August, 1 October and major festivals. At other times, the flag-raising ceremony in Tiananmen Square will be held between 7: 36 am and 8 am.

It is worth noting that the flag-raising time in Tiananmen Square is not completely fixed, and it will be adjusted according to the local weather and special circumstances. For example, in extreme weather conditions, the flag-raising time may be delayed or cancelled. Therefore, if you want to watch the flag-raising ceremony in Tiananmen Square, you'd better check the local weather forecast and official announcement in advance to ensure that you can arrive at the scene on time.

Calculation of flag-raising time

The national flag of Tiananmen Square strives to rise and fall synchronously with the sun, so the national flag is not fixed at all times, which is inseparable from the support of scientific research: it is necessary to have a full understanding of celestial mechanics and to make high-precision predictions on the positions of important celestial bodies on the basis of precise astrometry. These systematic and complex knowledge constitute a special branch of astronomy-almanac astronomy.

Calculating the flag-raising time involves the Sunday apparent motion of the sun with the rotation of the earth. Because sunlight refracts when it passes through the earth's atmosphere, the height of the sun seen by the naked eye is different from the actual one. For the same place, the sun appears and disappears at different times on different days, and it will change with the seasons. Every day, you can see the first ray of sunshine crossing the horizon at different times, so the time of raising the flag is different.

Take Tiananmen Square as an example. From June 65438+1 October1to June 12, 2023, the flag-raising time was gradually advanced from 7: 36 to 4: 45. From June 19 to February 30th, the flag-raising time was gradually postponed from 4: 46 to 7: 36.